397226745 has 12 divisors (see below), whose sum is σ = 688526436. Its totient is φ = 211854240.

The previous prime is 397226741. The next prime is 397226747. The reversal of 397226745 is 547622793.

397226745 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 165791376 + 231435369 = 12876^2 + 15213^2 .

It is not a de Polignac number, because 397226745 - 2² = 397226741 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 8827261 = 397226745 / (3 + 9 + 7 + 2 + 2 + 6 + 7 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 397226745.

It is not an unprimeable number, because it can be changed into a prime (397226741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4413586 + ... + 4413675.

It is an arithmetic number, because the mean of its divisors is an integer number (57377203).

Almost surely, 2^397226745 is an apocalyptic number.

It is an amenable number.

397226745 is a deficient number, since it is larger than the sum of its proper divisors (291299691).

397226745 is a wasteful number, since it uses less digits than its factorization.

397226745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8827272 (or 8827269 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 397226745 is about 19930.5480356161. The cubic root of 397226745 is about 735.0995561382.

The spelling of 397226745 in words is "three hundred ninety-seven million, two hundred twenty-six thousand, seven hundred forty-five".